I didn't say anything about "identifying a particular user". When I said "the cause identified, bug or user" I didn't mean the particular user, but the series

I didn't say anything about "identifying a particular user". When I said "the cause identified, bug or user" I didn't mean the particular user, but the series of user actions that lead to the outage. Outages caused by user action shouldn't be able to happen, so I think they are really what you call an unknown bug. Any person running a website that tries to blame a user for non-malicious actions that cause an outage is just trying to shift blame from where it rightly belongs.